What Capacity Options Are Available and How to Select the Right CNG Tube Trailer Equipment?

When selecting equipment for L-CNG refueling stations, industrial gas supply, or town gas projects, matching specifications and capacity directly impacts project return on investment and operational efficiency. Faced with different configuration options on the market, making a sound judgment is a core concern for many project decision-makers.

First, understand the capacity concept: from water capacity to standard cubic meters.

Before selecting equipment, it is essential to clarify two key indicators: Water Capacity and Standard Cubic Meters (Nm³) .

· Water Capacity refers to the physical volume of the cylinder's internal cavity, typically measured in cubic meters (m³). It determines the "physical size" of the tube trailer equipment.

· Standard Cubic Meters (Nm³) refers to the volume occupied by the gas under standard conditions (0°C, 101.325 kPa). It determines "how much effective gas you can transport per trip."

The conversion relationship between the two depends on working pressure and temperature. Taking a working pressure of 20MPa as an example, a CNG tube trailer with a total water capacity of approximately 26m³ has a standard cubic meter storage capacity of around 4,600 Nm³. When using higher pressures (such as 25MPa or 30MPa), the gas carrying capacity under the same water capacity will increase accordingly. Therefore, when evaluating capacity, using "standard cubic meters" directly as the demand benchmark can more accurately match the project's actual gas consumption.

So how do you choose a capacity solution based on project requirements?

The core logic of capacity selection is not about "big" or "small," but about matching the end-user gas consumption pattern, transportation distance, and site conditions. Based on our actual project experience, we categorize common scenarios into three types:

Scenario 1: Small to Medium-Sized Stations or Space-Constrained Scenarios

For community gasification stations, small to medium-sized CNG refueling stations, or projects with height or width restrictions on transport routes, it is recommended to choose 20-foot specification tube trailer equipment. This specification is typically configured with 8 to 12 cylinders, with a total water capacity between 17 and 23m³, and a standard cubic meter storage capacity of approximately 3,000 to 4,500 Nm³. Its advantage lies in a smaller turning radius and better adaptability to site and road conditions.

Scenario 2: Large to Medium-Sized Stations or Long-Distance Transport

For projects with a daily gas consumption of over 6,000 Nm³, ample site conditions, and primarily long-distance transport, 40-foot specification is the more economical choice. This specification typically uses a 12 long-cylinder configuration, with a total water capacity of up to 30m³ and a standard cubic meter storage capacity of approximately 6,000 to 7,500 Nm³. The larger single-trip gas carrying capacity effectively reduces unit transportation costs and improves the overall economic efficiency of the entire chain.

Scenario 3: Entering the Hydrogen Sector or Accommodating Multiple Media

With the rapid development of the hydrogen energy industry, more and more operators are choosing to configure hydrogen tube skids or H₂ tube trailers, or CNG hydrogen dual-use skids and other products with dual-media compatibility. These types of equipment are designed from the outset to meet the storage and transport requirements of both CNG (20-30MPa) and hydrogen (25-30MPa and above).

The significance of choosing such products is: one piece of equipment can flexibly switch operating media based on market changes. When CNG demand is stable, operate according to the standard plan; when a hydrogen order arrives, respond quickly without needing to purchase new equipment. This flexibility greatly improves asset utilization and reduces sunk costs caused by business restructuring. For high-pressure hydrogen storage scenarios, the compressed hydrogen storage container is an ideal choice for the hydrogen storage link at refueling stations, forming a complete set with tube trailer transport equipment.

Your Customization Scope: Specifications Are Not Just Standard Answers

In actual projects, standard specifications do not always perfectly fit every specific need. To this end, we offer the following customizable dimensions to ensure the equipment precisely matches your project:

From the selection of cylinder material (steel, glass fiber wound, or carbon fiber wound) to the determination of flange connection standards (ANSI, GB, or JIS), from the working pressure level to the combination of cylinder quantities, every parameter can be adjusted according to your chassis configuration and operational requirements.

Three Issues to Consider During Selection

1. How to choose the pressure level?

The current mainstream working pressures are 20MPa and 25MPa. For projects involving long-distance transport and pursuing maximum single-trip load capacity, the market acceptance of 30MPa equipment is rapidly increasing. For every 5MPa increase in working pressure, the effective gas carrying capacity under the same water capacity can increase by approximately 20% to 25%.

2. How to weigh cylinder materials?

· Seamless steel cylinders (Type I): Significant cost advantages, mature technology, strong adaptability, suitable for the vast majority of CNG and hydrogen storage and transport scenarios.

· Wound cylinders (Type II, Type III): Lighter self-weight, allowing for more gas to be loaded under the same axle load, suitable for long-distance transport projects sensitive to load weight. However, note that if used for hydrogen, additional hydrogen environment compatibility assessment is required.

3. Does the certification system align with the target market?

For export projects, it is recommended to confirm certification requirements in advance:

· EU Market: Must comply with PED/TPED directives, with the cylinder standard being ISO 11120.

· US Market: Must meet DOT 3AAX/3T standards, and the allowable stress must be recalculated for hydrogen media.

· Russian and CIS Market: Must obtain EAC certification.

· Chinese Domestic Market: Must follow NB/T 10354 "Tube Trailer" and relevant technical specifications for hydrogen refueling stations.

We can provide a complete set of certification documents based on your target market to ensure smooth customs clearance.

About Us

We are a full-industry-chain enterprise integrating R&D, design, production, sales, and system integration, with our core business covering the entire lifecycle of high-pressure gas storage and transport equipment.

1. Technical Accumulation
We have long-term technical沉淀 in the field of high-pressure gas storage and transport, mastering core technologies such as large-volume steel-lined wound gas cylinders and hydraulic-driven compression. We have delivered nearly 3,000 hydrogen tube trailers and cylinder bundles to the market. Our products served the hydrogen storage and transport support for the main torches of the Shanghai World Expo, the Shenzhen Universiade, and the Beijing Winter Olympics, withstanding the test of major international events.

2. Qualification System
Our company holds multiple international certifications including ASME (U/U2/T/U3), DOT 3AAX/3T, CE (PED+TPED), EAC, TC, KGS, and PESO. With a comprehensive qualification system, our products can meet the technical regulations and access requirements of major global markets, providing a solid compliance foundation for the export of Chinese high-end equipment.

3. Market Coverage
Our products are currently exported to more than 50 countries and regions. Our customers include world-class gas companies such as AIR LIQUIDE, Messer, Linde, and BOC. These clients have extremely strict standards for equipment safety, reliability, and long-term stability. Their continued repeat purchases are the best validation of our technology and service capabilities.

In conclusion, project conditions vary. We recommend providing us with your chassis parameters, daily gas consumption, target market, and media type. Our technical team will conduct a systematic evaluation and deliver the most suitable capacity solution and equipment configuration for you.